Date: Sat, 12 Jan 2002 15:59:50 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: Peter Wemm <peter@wemm.org> Cc: arch@FreeBSD.ORG, Archie Cobbs <archie@dellroad.org>, Dan Eischen <eischen@vigrid.com>, Daniel Eischen <eischen@pcnet1.pcnet.com>, Nate Williams <nate@yogotech.com>, Kelly Yancey <kbyanc@posi.net>, Alfred Perlstein <bright@mu.org>, Terry Lambert <tlambert2@mindspring.com>, Bruce Evans <bde@zeta.org.au> Subject: Re: Request for review: getcontext, setcontext, etc Message-ID: <XFMail.020112155950.jhb@FreeBSD.org> In-Reply-To: <20020112203429.EE98738CC@overcee.netplex.com.au>
next in thread | previous in thread | raw e-mail | index | archive | help
On 12-Jan-02 Peter Wemm wrote: >> The Xdna trap to do load the state if we guessed wrong about the >> next timeslice not using the FPU takes about 200 instructions >> including several slow ones like iret, so we don't get near 38 >> instructions in all cases although we could (Xdna can be written >> in about 10 instructions if it doesn't go through trap() and >> other general routines). > > Hmm, that is good to know too. And worth implementing at some point. :) -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.020112155950.jhb>